Again, you equate two things that are not the same. Concerned parents are not the same as a faceless govt 'forcing' you to pay toll taxes via a transponder.
Further, no one was 'forcing' her to use her parents' car. She could have had friends pick her up and go to wherever. She could have biked over to wherever she wanted to go. Or taken (gasp) a bus! She could have driven to the spot she was saying she was at and then had friends take her over to the other place. You seem to make this case out to be an impossible thing for the kid to overcome. Your transponder tax issue is so much more massive than one kid who has other viable transportation issues.
That is why I don't believe such an action is going to make her or anyone else more likely to just comply. You're comparing apples and oranges. The slippery-slope conditioning argument just doesn't fly here. Perhaps you'd have a better case if government was forcing parents to track their children, then I could see where this is going.
YOu know, if you're so bent out of shape about this, what about all the cameras that record you multiple times through the day at private businesses or parking lots or private security that records you? Why aren't you more upset about schools tracking the daughter and recording her on cameras all day, perhaps without her knowing about it? Why aren't you more concerned about that, than parents who are concerned about what their kid does when mom and dad aren't around? from a privacy standpoint, I'd rather have the parents tracking their own kids if they want to, instead of government (schools, whatever) forcibly tracking everyone.
This is why your argument as it stands falls way short. You can't logically equate the two. One is so much huger in scope and not voluntary. they are so different foundationally that it is just not proper to say equate them to each other.
I don't support the big brother cameras everywhere, either. We are creating a society of people that depend on someone else to make their decisions and police their actions. We are teaching our kids that freedom is dangerous and not important. So we get an entire generation that values only a false sense of safety and that will sell away any liberty to get it. I'm not sure how you can't see the connection. I assume it's because you don't want to.